diff --git a/CHANGES.rst b/CHANGES.rst
index c4c8168..7043911 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,6 +2,12 @@
  Changes
 =========
 
+3.0.3 (unreleased)
+==================
+
+- Nothing changed yet.
+
+
 3.0.2 (2023-12-08)
 ==================
 
diff --git a/src/greenlet/__init__.py b/src/greenlet/__init__.py
index a40a957..12a4c4f 100644
--- a/src/greenlet/__init__.py
+++ b/src/greenlet/__init__.py
@@ -25,7 +25,7 @@
 ###
 # Metadata
 ###
-__version__ = '3.0.2'
+__version__ = '3.0.3.dev0'
 from ._greenlet import _C_API # pylint:disable=no-name-in-module
 
 ###